He is a professor of management science and engineering at Stanford University, director of the Precourt Energy Efficiency Center, and a senior fellow at the Stanford Institute for Economic Policy Research. He recently served on the review panel for the State of California Public Interest Energy Research Program, the National Research Council's Committee on Benefits of DOE R&D in Energy Efficiency and Fossil Energy, and the National Research Council's Committee on Effectiveness and Impact of Corporate Average Fuel Economy (CAFE) Standards.